New tribal placements, reinstatements and synonymies in the leafhopper subfamily Deltocephalinae (Hemiptera: Cicadellidae)

The higher classification of Deltocephalinae Fieber, 1869 (992 genera, 7243 species) is revised to reflect the results of recent phylogenomic analyses of 730 terminal taxa and > 160 000 nucleotide positions, which provided well-resolved and supported estimates of relationships among major deltocephaline lineages. The revised classification recognizes 30 monophyletic tribes and 24 subtribes. Diagnostic morphological characters of the newly redefined tribes are discussed and a revised key to tribes is provided. Proposed changes include the following: Athysanini Van Duzee, 1892 is redefined to include the nominotypical subtribe (corresponding to the previously recognized Holarctic Athysanus-group of genera), subtribe Cochlorhinina Oman, 1943 stat. nov., and Koebeliina Baker, 1897 stat. nov. (= Grypotinae Haupt, 1929 syn. nov.). Eupelicini Sahlberg, 1871 is redefined to include the nominotypical subtribe, Drakensbergenina Linnavuori, 1979 stat. nov., Paradorydiina Evans, 1936, and Stenometopiina Baker, 1923 stat. nov. Penthimiini Kirschbaum, 1868 includes junior synonym Magnentiini Linnavuori, 1978 syn. nov. Platymetopiini Haupt, 1928 is reinstated from synonymy under Athysanini to include the Palearctic type genus and most of the endemic Neotropical genera previously included in Athysanini; it also includes Cerrillini Linnavuori, 1975 syn. nov. Scaphoideini Oman, 1943 is redefined to include the nominotypical subtribe, Drabescina Ishihara, 1953 stat. nov. (= Paraboloponidae Ishihara, 1953, syn. reinstated), and Phlepsiina Zahniser & Dietrich, 2013 stat. nov. Selenocephalini Fieber, 1872, is redefined to include the nominotypical subtribe Selenocephalina (= Ianeirini Linnavuori, 1978 syn. nov., Adamini Linnavuori & Al-Ne’amy, 1983 syn. nov., and Dwightlini McKamey, 2003 syn. nov.) and subtribes Bonaspeiina Zahniser & Dietrich, 2013 stat. nov., and Hypacostemmina Linnavuori & Al-Ne’amy, 1983 stat. nov. Vartini Zahniser & Dietrich, 2013 is redefined to include the nominotypical subtribe, Punctulina Dai et al., 2017 stat. nov., and Bambusanina subtribe nov., which is erected to include seven bamboo-feeding genera formerly placed in Athysanini. Several genera are also transferred among tribes based on the recent phylogenomic results. A complete list of tribes, subtribes, and their included genera is provided. Paramesanus Dlabola, 1979 syn. nov. is considered a junior synonym of Awasha Heller & Linnavuori, 1968 resulting in the new combination Awasha wittmeri (Dlabola, 1979) comb. nov. Mascoitanus Linnavuori & Heller, 1961 stat. nov., formerly a subgenus of Brasilanus Linnavuori, 1959, is raised to generic status resulting in the new combination Mascoitanus lateralis (Linnavuori & Heller, 1961) comb. nov. Omanellinus Zhang 1999 syn. nov. is considered a junior synonym of Omanella Merino, 1936, resulting in the new combination, Omanella populus (Zhang, 1999) comb. nov. Xugyrosus nom. nov., is proposed as a replacement name for Gyrosus Xu & Zhang, 2023, resulting in the new combination, Xugyrosus deltodontus (Xu & Zhang, 2023) comb. nov.